Portable welding system



FIG. 1 is an isometric view of our new design;

FIG. 2 is a first side view of the design of FIG. 1;

FIG. 3 is a second side view of the design of FIG. 1;

FIG. 4 is a top view of the design of FIG. 1;

FIG. 5 is a bottom view of the design of FIG. 1;

FIG. 6 is a front end view of the design of FIG. 1; and,

FIG. 7 is a rear end view of the design of FIG. 1.

The broken lines illustrate the environmental structure and form no part of the claimed design. 

CLAIM The ornamental design for a portable welding system, substantially as shown and described. 